How to divide a two-tube 12-core optical cable

A two-tube 12-core optical cable can be divided using midspan access and fan-out kits to safely separate individual fibers for termination or network distribution.

Step 1: Preparation and Safety

Before starting, ensure the network is powered down to prevent data loss or damage. Wear safety glasses and gloves to protect against fiber shards, and work in a clean environment to avoid contamination of the fibers . Gather the necessary tools: fiber optic stripper, cleaver, splicing machine, protective sleeves, and optionally an optical power meter for testing .

Step 2: Accessing the Cable

1. Identify the section of the cable where the split is required.
2. Remove the outer jacket of the cable carefully using a fiber optic stripper, exposing the two buffer tubes .
3. Remove any binder tapes, water-blocking materials, and strength members, leaving enough of the central member to attach to a splice closure .

Step 3: Separating the Tubes

1. Locate the reversal point of the helical winding in each buffer tube to ensure neat unwinding .
2. Carefully unwind the two tubes, setting aside the fibers that will remain intact while preparing the fibers to be split .
3. Coil the untouched fibers neatly for storage in the splice closure to prevent bending stress .

Step 4: Using a Fan-Out Kit

A 12-core fiber optic fan-out kit is recommended to separate the fibers into individually protected legs. Choose the appropriate tube diameter (0.9mm, 2.0mm, or 3.0mm) based on routing density and handling needs . Insert each fiber into the fan-out tube to prevent breakage and simplify termination in FTTH endpoints, ODFs, or data center patching environments .

Step 5: Splicing or Termination

1. Strip the buffer coating from the fibers to expose the bare glass core.
2. Use a cleaver to make precise cuts and a splicing machine to join fibers if connecting to drop cables or network endpoints .
3. Protect the spliced area with sleeves and ensure proper strain relief to maintain signal integrity .

Step 6: Testing and Finalization

After splitting and splicing, use an optical power meter to verify signal strength and check for attenuation or loss. Properly store and organize the remaining fibers in the splice closure to prevent tangling or bending stress .

Additional Considerations

• Passive optical splitters can be used if the goal is to distribute the signal to multiple endpoints without active amplification .
• Avoid bending fibers beyond their minimum bend radius to prevent breakage or signal degradation .
• Ensure consistent routing and strain relief practices to reduce the risk of fiber damage during future maintenance . By following these steps, a two-tube 12-core optical cable can be safely divided, allowing for flexible network expansion and reliable fiber termination.